Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Parabola question. I've never done one before and I need some help.?
The equation is:Y=-3 x2-6x-5
So far I have
-2 Y= -3(-22 ) -6(-2)-5 - 12+12-5= -5 (-2,-5)
0 Y= -3(02 ) -6(0)-5 0-0-5= -5 (0,-5)
2 Y= -3(22 ) – 6(2)-5 -12 -12-5=-5 (2, -29)
I have the y intercept graphed correctly but how do I graph the vertex?
1 Answer
- Mrs.WLv 41 decade agoFavorite Answer
to find the vertex use x = -b/2a where b = -6 a = -3
x = 6/-6 = -1
Y = -3(-1)^2 - 6(-1) -5
Y = -3 + 6 - 5 = -2
vertex (-1,-2).
parabola opens down and has symmetry about the vertex.. If you have a point (0,-5) [one unit right and down five units] you will have a matching point (-2,-5) [one unit left and down five units]on the other side of the vertex.